Hi there, I'm hoping there's someone still active on this forum that might be able to help. I've just begun building my x0xb0x. I've been using my Multimeter to test along the way and everything is within range. However, when it came time to set the 2k trimpot to 5.333v unfortunately that value is JUST beyond the reach of the trim. I get a range of (when measuring the 3rd pin of J4) 4.99v - 5.32v.

I read a few posts on this forum by people having similar problems which led me to re-check all the resistor values. They are all correct and in the right spot. I've recorded the voltages on the 6562 and also the voltages of several junctions on the board that were requested in another person's post. Hopefully they help identify my problem/s!

Hey mate thanks for your reply! Yep I've done all the PSU tests as per the fab manual. Using a 6562 and an LM336Z-5. I did attempt testing the 2k trim but I wasn't really sure what I was doing.. should I wind it all the way to the right and then test the further most legs?

I emailed a guy that sold me some of the parts, he said he had a similar problem and that I should try replacing the LM336Z as sometimes they can be pretty far off spec? Is there a way to test and see if this could be the case? I went ahead a purchased 5 more new LM336Z just to give this idea a go.